CN219703705U

CN219703705U - Chip breaking reamer

Info

Publication number: CN219703705U
Application number: CN202320638996.3U
Authority: CN
Inventors: 马清海; 陈东阳
Original assignee: Smc Tianjin Manufacturing Co ltd; Smc China Co ltd; SMC Beijing Manufacturing Co Ltd; SMC Corp
Current assignee: Smc Tianjin Manufacturing Co ltd; Smc China Co ltd; SMC Beijing Manufacturing Co Ltd; SMC Corp
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-09-19
Anticipated expiration: 2033-03-28

Abstract

The utility model discloses a chip breaking reamer, and belongs to the field of machining tools. The reamer comprises a cutter body, wherein one end of the cutter body is provided with a cutting tool bit, the cutting tool bit is provided with a main cutting edge and a trimming tool, an included angle between the main cutting edge and a rotation axis of the cutter body is an acute angle, and the trimming tool extends along the axis direction of the cutter body; the main cutting edge and the trimming edge are in transition through a chip breaker. The reamer solves the problem of poor reaming precision caused by the conditions of unsmooth chip removal, unstable cutter chip winding, unstable allowance and the like of the existing reamer.

Description

Chip breaking reamer

Technical Field

The utility model relates to the field of machining tools, in particular to a chip breaking reamer.

Background

When the hole products are processed, the allowance is large, the precision requirement is high, and when the hole products are processed, a drill bit, a boring cutter and a reamer are matched, so that the processing requirement is met. In the reaming process of the existing reamer, the problem of poor reaming precision is often caused by the conditions of unsmooth chip removal, unstable cutter chip winding, unstable allowance and the like.

Disclosure of Invention

Based on the technical problems, the utility model provides a chip breaking reamer with smooth chip removal.

Aiming at the technical problems, the utility model provides the following technical scheme:

a chip breaking reamer comprising: the cutting tool comprises a tool body, wherein one end of the tool body is provided with a cutting tool bit, the cutting tool bit is provided with a main cutting edge and a trimming tool, an included angle between the main cutting edge and a rotation axis of the tool body is an acute angle, and the trimming tool extends along the axis direction of the tool body; the main cutting edge and the trimming edge are in transition through a chip breaker.

In some embodiments of the present utility model, the chip breaker is located on the wiper blade, and the chip breaker is formed as a groove body with a triangular longitudinal section.

In some embodiments of the present utility model, the length of the chip breaker in the direction of the rotation axis of the tool body is 0.3mm to 0.8mm, and the depth of the chip breaker in the radial direction of the tool body is 0.1mm to 0.3mm.

In some embodiments of the present utility model, an angle between a first groove wall of the chip breaker adjacent to the main cutting edge and a rotation axis direction of the tool body is 20 ° -40 °.

In some embodiments of the present utility model, an angle between a second groove wall of the chip breaker groove, which is far from the main cutting edge, and a rotation axis direction of the tool body is 60 ° -80 °.

In some embodiments of the present utility model, the cutter body is made of cemented carbide, a diamond blade is welded to the cutting blade, and the main cutting edge and the wiper are formed on the diamond blade.

In some embodiments of the present utility model, two diamond blades are symmetrically welded on the cutting blade, and a main cutting edge and a wiper edge are respectively provided on the two diamond blades.

In some embodiments of the utility model, the angle between the two main cutting edges is between 100 ° and 150 °.

In some embodiments of the utility model, the difference between the radial distance of the two wiper edges and the radial distance of the notches of the two chip breakers is between 0.06mm and 0.08mm.

In some embodiments of the present utility model, the cutter body and the cutting bit are in transition through a first step surface, and the cutting bit is provided with a chip groove, and the chip groove intersects with the first step surface to form a chamfer cutting edge.

Compared with the prior art, the technical scheme of the utility model has the following technical effects:

the utility model provides a chip breaking reamer, wherein a chip breaking groove is arranged between a main cutting edge and a trimming edge for transition, so that metal chips cut by the main cutting edge can be cut off to realize the effects of layered cutting and chip breaking, chip discharge is facilitated, the thickness and length of the metal chips can be effectively reduced, and the surface roughness and the machining precision of reaming are ensured. The layering cutting can ensure the maximum cutting amount and the finish machining allowance, the machining precision is high, and the surface roughness of RZ below 0.8 can be ensured. The debugging cost of the workpiece is reduced, and the working efficiency is improved.

Drawings

The objects and advantages of the present utility model will be better understood by describing in detail preferred embodiments thereof with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of a construction of an embodiment of a chip breaking reamer provided by the present utility model;

FIG. 2 is a front view of one embodiment of a chip-breaking reamer provided by the present utility model;

fig. 3 is an enlarged view of a portion of one embodiment of the chip breaking reamer provided by the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Fig. 1 shows a specific embodiment of the chip-breaking reamer provided by the utility model, which is used for cutting off thin metal on the surface of a machined hole so as to enable the surface of the hole to be machined to reach the required roughness.

The chip breaking reamer comprises a cutter body 10, wherein one end of the cutter body 10 is provided with a cutting bit 11, the end part of the cutting bit 11 forms a main cutting surface and is provided with a main cutting edge 12, a secondary cutting surface adjacent to the end part of the cutting bit 11 is provided with a trimming blade 13, the main cutting edge 12 and the rotation axis of the cutter body 10 are acute angles, the trimming blade 13 extends along the axial direction of the cutter body 10, and the main cutting edge 12 and the trimming blade 13 are in transition through a chip breaking groove 14.

The chip breaking reamer is in transition between the main cutting edge 12 and the trimming edge 13 through the chip breaking groove 14, so that metal chips cut by the main cutting edge 12 can be cut off to realize the effects of layered cutting and chip breaking, chip discharge is facilitated, the thickness and length of the metal chips can be effectively reduced, and the surface roughness and the machining precision of reaming are ensured. The layering cutting can ensure the maximum cutting amount and the finish machining allowance, the machining precision is high, and the surface roughness of RZ below 0.8 can be ensured. The debugging cost of the workpiece is reduced, and the working efficiency is improved.

Specifically, the length l of the tool body 10 ₁ Between 90mm and 100mm, an outer diameter phi ₁ Is 9mm-11 mm; length l of the cutting bit ₂ Is between 10 and 30mm, has an outer diameter phi ₂ Between 6mm and 8mm, the tool body 10 and the cutting insert 11 are transitioned by a first step surface 16, the angle γ between the first step surface 16 and the axis of rotation of the tool body 10 being 80 ° -100 °, for example, the angle γ being 90 °.

Specifically, in an alternative embodiment, the chip breaker 14 is located on the wiper 13 and is located at a region where the wiper 13 approaches the intersection of the main cutting edge 12, and the chip breaker 14 is formed as a groove structure with a triangular longitudinal section, so as to quickly cut off the metal chips cut by the main cutting edge 12.

In order to ensure the strength of the main cutting edge 12 and the wiper edge 13 during machining, in an alternative embodiment, the chip breaker groove 14 has a length l in the direction of the axis of rotation of the tool body 10 ₃ From 0.3mm to 0.8mm, preferably the length l ₃ Is 0.6mm.

Specifically, in an alternative embodiment, the chip breaker groove 14 has a depth w in the radial direction of the tool body 10 of 0.1mm-0.3mm, preferably a depth w of 0.2mm.

Specifically, in an alternative embodiment, the first groove wall of the chip breaker groove 14, which is adjacent to the main cutting edge 12, forms an angle α with the direction of the axis of rotation of the tool body 10 ₁ 20-40 degrees; preferably, the included angle alpha ₁ 30 deg..

In particular, in an alternative embodiment, the second groove wall of the chip breaker groove 14 remote from the main cutting edge 12 forms an angle α with the direction of the axis of rotation of the tool body 10 ₂ 60-80 degrees; preferably, the included angle alpha ₂ 70 deg..

Specifically, in an alternative embodiment, the cutter body 10 is made of cemented carbide, the cutting insert 11 is welded with a diamond blade 20, the main cutting edge 12 and the wiper 13 are formed on the diamond blade 20, and the cutting efficiency of the cutter can be improved and the service life of the cutter can be improved by using the diamond blade 20 with higher hardness as the cutting body of the reamer.

Specifically, in an alternative embodiment, in order to further improve the cutting efficiency of the reamer, two diamond blades 20 are symmetrically welded on the cutting bit 11, the two diamond blades 20 are respectively provided with a main cutting edge 12 and a wiper edge 13, specifically, the ends of the two diamond blades 20 respectively form the main cutting edge 12, the cutting surfaces adjacent to the cutting surfaces where the main cutting edge 12 is located respectively form the wiper edge 13, and the length l of the wiper edge 13 along the rotation axis direction of the cutter body 10 ₄ 5mm to 7mm, preferably, the l ₄ 6mm. The angle beta between the two main cutting edges 12 is 100 DEG to 150 DEGA compartment; preferably, the included angle β is 120 °.

In particular, in an alternative embodiment, the radial distance d of two of said wiper edges 13 ₁ Radial distance d from the notches of two of said chip breakers 14 ₂ Difference d of _x From 0.06mm to 0.08mm, i.e. the chip breaker 14 has a smaller drop than the wiper 13.

Specifically, the cutting insert 11 is provided with junk slots 17, and the junk slots 17 are extended along the rotation axis direction of the cutter body 10, and the length l of the junk slots along the rotation axis direction of the cutter body 10 ₅ In order to achieve machining of the chamfer of the machining orifice, 25mm-35mm, the junk slots 17 intersect with the first step surface 16 to form chamfer cutting edges 18.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While obvious variations or modifications are contemplated as falling within the scope of the present utility model.

Claims

1. A chip breaking reamer, comprising:

the cutting tool comprises a tool body, wherein one end of the tool body is provided with a cutting tool bit, the cutting tool bit is provided with a main cutting edge and a trimming tool, an included angle between the main cutting edge and a rotation axis of the tool body is an acute angle, and the trimming tool extends along the axis direction of the tool body; the main cutting edge and the trimming edge are in transition through a chip breaker.

2. The chip breaking reamer of claim 1, wherein the chip breaking groove is located on the wiper edge, the chip breaking groove being formed as a groove body having a triangular longitudinal cross section.

3. The chip breaker according to claim 2, characterized in that the chip breaker has a length of 0.3mm-0.8mm in the direction of the rotation axis of the tool body and a depth of 0.1mm-0.3mm in the radial direction of the tool body.

4. The chip breaker according to claim 2, characterized in that the first flute wall of the chip breaker adjacent to the main cutting edge forms an angle of 20 ° -40 ° with the direction of the axis of rotation of the tool body.

5. The chip breaker according to claim 2, characterized in that the second flute wall of the chip breaker, which is remote from the main cutting edge, is at an angle of 60 ° -80 ° to the direction of the axis of rotation of the tool body.

6. The chip breaking reamer of claim 1, wherein the cutter body is made of cemented carbide, the cutting tip is welded with a diamond blade, and the main cutting edge and the wiper edge are formed on the diamond blade.

7. The chip breaking reamer of claim 6, wherein the cutting blade is symmetrically welded with two diamond blades, and the two diamond blades are respectively provided with a main cutting edge and a trimming edge.

8. The chip breaking reamer of claim 7, wherein the angle between the two main cutting edges is between 100 ° and 150 °.

9. The chip breaker reamer of claim 7 wherein the difference between the radial distance of the two wiper edges and the radial distance of the notches of the two chip breakers is 0.06mm to 0.08mm.

10. The chip breaking reamer of claim 1, wherein the cutter body and the cutting bit transition through a first step surface, the cutting bit having chip grooves thereon, the chip grooves intersecting the first step surface to form a chamfer cutting edge.